org.apache.drill.exec.expr.fn

Interface PluggableFunctionRegistry

All Known Implementing Classes:

HiveFunctionRegistry

public interface PluggableFunctionRegistry

Method Summary

Modifier and Type	Method and Description
AbstractFuncHolder	getFunction(FunctionCall functionCall) If exists return the function implementation holder matching the given functionCall expression, otherwise null.
void	register(DrillOperatorTable operatorTable) Register functions in given operator table.

Method Detail

register

void register(DrillOperatorTable operatorTable)

Register functions in given operator table. There are two methods to add operators. One is addOperatorWithInference whose added operators will be used when planner.type_inference.enable is set to true; The other is addOperatorWithoutInference whose added operators will be used when planner.type_inference.enable is set to false;

Parameters:

operatorTable -

getFunction

AbstractFuncHolder getFunction(FunctionCall functionCall)

If exists return the function implementation holder matching the given functionCall expression, otherwise null.

Parameters:

functionCall -

Returns: